Amy Winehouse has allegedly cheated on her husband again.
The troubled singer - who is reportedly seeing her manager's assistant Alex Haines while spouse Blake Fielder-Civil is in prison - reportedly slept with Babyshambles guitarist Mik Whitnall, who has now been boasting to friends about his conquest.
A source told Britain's The Sun newspaper: 'He says they've slept together a couple of times. He told a few people after that stuff about her and Alex Haines came out.
'It's always supposed to have happened when they've been out drinking. He's told people about her birthmark in an intimate place, which is his way of proving it happened.'
However, Mik's manager insists the pair are just friends.
Reports of Amy cheating on Blake with Alex emerged last month, and he has now said to have demanded a £3 million divorce settlement.
Blake - who is currently in London's Pentonville Prison awaiting charges of grievous bodily harm (GBH) and conspiracy to pervert the course of justice - believes he is entitled to £250,000 for every month he has been married to the troubled singer.
A source said: "He has demanded £3 million at the very least from her £10 million fortune."